
Accession Number : AD0713074
Title : THE ROBUSTNESS OF THE STUDENT t TEST WHEN SAMPLING FROM A WEIBULL DISTRIBUTION.
Descriptive Note : Master's thesis,
Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
Personal Author(s) : Allen,David P.
Report Date : SEP 1970
Pagination or Media Count : 36
Abstract : When testing with the ttest, it is assumed that the sample under investigation is from a normal population. The purpose of this thesis is to examine the sensitivity of the ttest to violations of this normality assumption. A computer simulation was performed to draw sets of 10,000 samples from an infinite Weibull population. A ttest was performed on each sample to test the null hypothesis H sub 0: mu = or < mu sub 0 where mu sub 0 was the true mean of the Weibull population. The number of times that H sub 0 was rejected was recorded for all combinations of eight levels of significance, samples ranging in size from 2 to 31, and for values of the parameters of the distribution lambda = 1,2,3 and beta = 1,2,3. (Author)
Descriptors : (*STATISTICAL TESTS, SENSITIVITY), STATISTICAL DISTRIBUTIONS, EXPERIMENTAL DESIGN, LIFE EXPECTANCY, RELIABILITY, SIMULATION, SAMPLING, TABLES(DATA), THESES
Subject Categories : Statistics and Probability
Distribution Statement : APPROVED FOR PUBLIC RELEASE